If I am unblocked by an ex will he contact me?

I haven't spoken to my ex in 2 months the last time I tried I sent him one message that said happy holidays I hope we can remain friends he blocked me he recently unblocked me and now I get friend requests from fake Facebook accounts I don't accept them because I think it could be him. The fake Facebook adds started at 2 am on the night of his birthday I did not wish him a happy birthday. Could this be a coincidence? I really wanted to say happy birthday but I figured he might block me if I did